Steven Keiles, M.S., CGC
Director of Clinical Affairs
Mr. Keiles began working at Ambry in 2000 where he oversees the client services department. He is also involved in contracting, new product development, pricing, marketing, and research publication. Mr. Keiles obtained his masters degree in genetic counseling from Sarah Lawrence College in 1987. As a genetic counselor at Kaiser Permanente his responsibilities included clinic coordination, program implementation and counseling for all genetic referrals. He was elected the 2009 President of the National Society of Genetic Counselors, where he was responsible for leading the association and serving as the chief spokesperson. Mr. Keiles has more than 20 years of clinical experience and his research publications include molecular diagnostic testing for cystic fibrosis and pancreatitis.
Ira Lu, M.A., M.S., CGC
Manager of Clinical Diagnostics,
Ms. Lu graduated from the University of California, Los Angeles with a B.S. and M.A. in Microbiology and Molecular Genetics. She was actively involved in undergraduate genetics and microbiology courses as a teaching assistant and researched quantitative trait loci (QTL) for cholesterol gallstone susceptibility in a mouse model. She was the principal QTL curator for the Mouse Genome Database at The Jackson Laboratory from 2001-2009 and received her training in genetic counseling and M.S. in Human Genetics at Sarah Lawrence College in 2007. Prior to working at Ambry Genetics, Ms. Lu was a clinical prenatal genetic counselor with Genzyme Genetics.
Kelly D. F. Gonzalez, M.S., CGC
Senior Manager of Clinical Genomics
Ms. Gonzalez received a B.A. in Psychobiology from Scripps College (the Claremont Colleges) and a M.A. in Genetic Counseling from the University of Arizona. Prior to her graduate studies, she spent several years in a research lab studying DNA mutagenesis. She later worked for more than four years as a senior genetic counselor at the Molecular Diagnostic Laboratory at City of Hope, where she continued her involvement in research, most of which focused on Li-Fraumini Syndrome (LFS). She has more than 15 peer-reviewed publications in molecular genetics and has been an invited lecturer at several scientific meetings. Ms. Gonzalez leads Ambry's emerging clinical genomics offerings, most notably, the Clinical Diagnostic Exome, which allows her to draw on expertise in next-gen sequencing, as well as laboratory counseling.
Virginia Speare, Ph.D., CGC
Dr. Speare joined Ambry in 2012 following a career in cancer genetic counseling and prenatal genetic education with Crozer-Keystone Health System near Philadelphia, PA. She received her Ph.D. in Biology from Bryn Mawr College, Bryn Mawr, PA where her thesis explored the genetic makeup of the eukaryotic single cell organism, Tetrahymena thermophila. After completing clinical training in genetics at Children’s Hospital of Philadelphia, Dr. Speare was certified in Genetic Counseling by the ABGC. She has a special interest in issues of access to genetic health care and the education of clinicians who are integrating genetics and genomics into their practice.
Holly Laduca, M.S., CGC
Mrs. LaDuca, M.S., CGC received her B.S. in Health Science from Benedictine University, where she graduated magna cum laude. She then received her M.S. in Genetic Counseling from Northwestern University. Prior to joining Ambry, Mrs. LaDuca served as a clinical genetic counselor in the Department of Cancer Services at Northwest Community Hospital (Arlington Heights, IL).
Tami Johnston, M.S., CGC
Mrs. Johnston graduated from Tulane University with a B.S. in Cell and Molecular Biology and received her M.S. in Genetic Counseling with Distinction from California State University, Northridge. During her graduate training, Mrs. Johnston's clinical rotation sites included Cedars-Sinai Medical Center, Children’s Hospital Los Angeles and the University of California, Los Angeles Familial Cancer Registry & Genetic Evaluation Program. She then embarked on her career at Alfigen, The Genetics Institute, where she worked in both clinical and laboratory settings. She spent several years as a laboratory Genetic Coordinator at Genzyme Genetics before joining Ambry Genetics.
Melissa Parra, M.S., CGC
Ms. Parra, M.S., CGC joined the client services department at Ambry Genetics in 2010. She obtained her Bachelor of Science degree in Molecular Genetics from the University of California, Davis in 1997 and Master of Science degree in Genetic Counseling from California State University, Northridge in 2005. In her current position, Ms. Parra assists clients with test coordination, result reporting and interpretation. Her specialty within the department is in chromosome microarray analysis and the NextGen sequencing panel for X-linked mental retardation.
Tina Pesaran, M.A., M.S., CGC
Mrs. Pesaran graduated from UCLA with a B.S. in microbiology, immunology and molecular genetics. She remained at UCLA for her masters in microbiology, immunology and molecular genetics, studying the genetics of cardiovascular disease. She then received her master’s in genetic counseling from California State University, Northridge. Prior to working at Ambry, Mrs. Pesaran worked as a cancer genetic counselor at the GenRISK program at Cedars Sinai and then as a prenatal and cancer genetic counselor at Harlem Hospital Center.
Jill Siegfried, RN, MS, CGC
Ms. Siegfried, RN, MS, CGC joined Ambry in 2011, after serving for three years as a research genetic counselor with the Familial Dilated Cardiomyopathy Research Project (www.fdc.to) and as a clinical genetic counselor with the Cardiovascular Genetic Medicine Program at the University of Miami, Miller School of Medicine. From 2004-2008, she served as Program Coordinator for the Cancer Risk Evaluation Program at Pennsylvania Hospital in Philadelphia, PA. Ms. Siegfried graduated from the University of Delaware with BAs in Neuroscience and in Educational Studies, obtained a Bachelors of Nursing from LaSalle University in Philadelphia, PA and received her MS in Medical Genetics from the University of Cincinnati.
Aaron (AJ) Stuenkel, M.S., CGC
Mr. Stuenkel joined Ambry following his graduate training at Boston University School of Medicine, where he earned an M.S. in Genetic Counseling. He also holds a B.S. in Genetics from the University of California, Davis and prior to his current position, worked as a clinical cancer research coordinator at Massachusetts General Hospital. Mr. Stuenkel is a member of the National Society of Genetic Counselors (NSGC) and is board certified by the American Board of Genetic Counseling (ABGC).
Kendra Waller, M.S., CGC
Ms. Waller graduated with honors from Texas Tech University with a B.S. in Cell and Molecular Genetics and received her M.S. from University of Texas-Houston Health Science Center. She served as a prenatal genetic counselor in the Clinical Services Division of Genzyme Genetics prior to joining Ambry.
Elaine Chen, M.S., LCGC
Ms. Chen completed her B.A. in Psychology at the University of California at Berkeley where she also served as a Teaching Assistant for the Health and Medical Apprenticeship Program. She then worked in education for a few years before pursuing graduate studies. Ms. Chen completed her M.S. in Genetic Counseling at the University of California at Irvine (UCI). While at UCI, Ms. Chen worked as a Research Study Coordinator at the Center for Molecular and Mitochondrial Medicine and Genetics. Prior to joining Ambry, Ms. Chen worked for several years as a clinical prenatal genetic counselor with Integrated Genetics.
Stephany Tandy, M.S., GC
Ms. Tandy graduated from Purdue University with a B.S. in Genetic Biology in 2000, and worked in molecular/toxicology research laboratories in Indianapolis until attending graduate school. She earned her M.S. in Genetic Counseling from Arcadia University in Philadelphia, and then moved to southern California to work as a clinical Genetic Counselor, specializing in pediatric and cancer genetics for Kaiser Permanente. She joined the Ambry team in the beginning of 2012 as a Genetic Counselor focused on cancer genetics.
Jeannine St. John, M.S., LCGC
Accessioning Genetic Counselor
Ms. St. John graduated from Illinois State University in 2008 with a B.S. in Biological Sciences. Ms. St. John then completed a Summers of Discovery Internship at the National Institute of Environmental Health Sciences performing research with the Microarray Group at the Research Triangle Park in Durham, NC. She then received her M.S. in Genetic Counseling from the University of California, Irvine in 2010. Prior to working at Ambry, Ms. St. John worked with the California Prenatal Screening Program at the University of California, Irvine as a Program Coordinator.
Andrea Muirhead, M.S., CGC
Ms. Muirhead joined Ambry in 2012 after earning her M.S. in Genetic Counseling at Boston University School of Medicine. She also received a B.S. in Behavioral Neuroscience from Northeastern University. Prior to her graduate studies, she worked for several years at the Laboratory for Molecular Medicine in Cambridge, MA.
Cristi Radford, M.S., CGC
Ms. Radford received her B.S. in Genetics from the University of Georgia and her M.S. in Genetic Counseling from the University of South Carolina. Prior to joining Ambry in 2012, she spent seven years specializing in cancer genetic counseling in the community setting. She has also had research positions at Johns Hopkins University and Moffitt Cancer Center. She is the current president of Lynch Syndrome International (LSI) and a columnist for The Oncology Nurse.
Diana Tuman, M.S.
Product Manager, Genetic Counselor
Ms. Tuman joined Ambry in 2012 where she works as genetic counselor in the marketing department. She completed her B.S. in Human Physiology at Michigan State University, where she participated in genomics research. She then joined an New York advertising agency and had an opportunity to work on international campaigns like AT&T, Chevron and Kraft Foods. She also had the opportunity to represent major New York institutions like the American Museum of Natural History, St. Patrick's Cathedral and Bard Graduate Center. Ms. Tuman then received her M.S. in Genetic Counseling from University of Alabama at Birmingham where she focused on emerging technologies like exome sequencing and its application to patient care.
Layla Shahmirzadi, M.S.
Ms. Shahmirzadi joined Ambry in 2012 as a genetic counselor specializing in genomics after earning her M.S. in Genetic Counseling from Stanford University School of Medicine. She has a strong educational background in new technologies including next-generation sequencing with a particular interest in whole genome/whole exome sequencing. Prior to beginning her genetic counseling training, Ms. Shahmirzadi worked as a genetic counselor assistant at the Cancer Risk Program at UCSF and as a DNA Technician at the Armed Forces DNA Identification Laboratory. She also earned a second M.S. in Biotechnology from Johns Hopkins University and her B.S. in Psychology from University of California, Davis.
Stephanie Gandomi, M.S., LGC
Mrs. Gandomi began her training as a genetic counselor at the University of Melbourne in Australia in 2002 and graduated from Brandeis University with an M.S. in Genetic Counseling in 2006. She obtained her undergraduate degree in communications in 2000, and has also pursued additional graduate studies in prenatal psychology. While at Brandeis, she worked as a research genetic counselor in the Department of Nephrology at the Harvard Institutes of Medicine in Boston investigating the genetics of focal segmental glomerulosclerosis (FSGS). She then moved to California in 2006 to co-establish the Stanford University/Lucile Packard Children’s Hospital Perinatal Diagnostic Center in Salinas. Prior to working at Ambry, Mrs. Gandomi was a community health supervisor at the State of California Prenatal Screening Program in Sacramento.